Table 2.
The behavioral parameters of layer pullets measured during the preference test
| Parameter | Unit | Definition |
|---|---|---|
| Daily time spent (DTS) | h/pullet·per day | Overall time spent in a compartment with a specific light color within a day |
| Daily percentage of time spent (DPTS) | % | DTS/12 h×100% |
| Daily times of visit (DTV) | times/pullet·per day | Number of visits to a compartment within a day |
| Duration per visit (DV) | Min/visit | DTS/DTV |
| Daily feed intake (DFI) | g/pullet·per day | Feed consumption within a day |
| Daily feeding time (DFT) | h/pullet·per day | Overall time spent at feeder within a day |
| Feeding rate (FR) | g/min | DFI/DFT |
| Distribution of pullet occupancy (DPO) | % | Percentage of birds in a compartment |
| Hourly time spent in compartment (HTS) | Min/pullet·per hour | Time spent in a compartment within each hour within a day |